Pivotal door construction and method



Jan. 31, 1967 G. RISK ETAL PIVOTAL DOOR CONSTRUCTION AND METHOD FiledDec. 21, 1964 FIG. 4.

GEQRGE RISK INVENTORS JOSEPHHE. soT:R,& RAYMOND c ROOT ATTQRNEY UnitedStates Patent 3,300,900 PIVOTAL DOOR CONSTRUCTION AND METHOD GeorgeRisk, Raymond C. Root, and Joseph E. Sotir,

Columbus, Nebr., assignors to Loup Engineering Company, Columbus, Nebn,a corporation of Nebraska Filed Dec. 21, 1964, Ser. No. 419,965 6Claims. (Cl. 49381) This invention relates to a novel pivotalconstruction for gates and doors. In particular, this invention providesa sturdy and easy to install pivotal connection between a gate or doorand an upright post-like jamb support therefor, said pivotalconstruction being especially desirable for tub and shower enclosures.

In the bathroom fixture industry, apivotal door is commonly installedinto the doorway opening of a tub or shower enclosure. The typicalshower door structure comprises a thin translucent rectangular panesecurely bounded by four channeled rail frames, the respective framesintersecting one another in a bevelled-comer relationship. The showerdoor is then pivotably connected to a post-like jamb uprightly supportedalong one side of the doorway opening. The bathroom fixture industry hasgenerally employed conventional two-plate hinges, comprising twoperforate plates revolvably attached to an intervening hinge pin, as themeans for pivotably connecting the shower door to the upright post-likejamb.

While the conventional two-plate hinge is admirably well suited bothfunctionally and economically in the preponderance of doorconstructions, this general suitability does not extend to tub andshower enclosures. For example, because a continuous flow of water isdirected from a shower head toward the pivotal connection between theshower door and its post-like jamb, the junc ture of the shower door andits jamb should be substantially leak-proof. However, heavy-duty hingesdo, by virtue of the plate thickness, physically separate the showerdoor from its jamb. Further, this physical separation limits theaesthetic appeal of a shower door construction, the trend in thebathroom fixture industry being to beautify the various fixtures. Whentwo-plate hinges are employed, there is an inherent limitation in thedesignability of aesthetically attractive jambs and doors withoutimpairment of the pivotal relationship therebetween.

Another disadvantage of the two-plate hinge in the bathroom fixturetrade resides in that it is extremely difficult for a lone operator toinstall a high quality pivotal connection wherein the jamb and theadjacent upright door frame are parallel as well as vertical. Further,the bottom frame of the door must be installed a prescribed distancefrom and parallel to the base of the doorway. This is because there is agutter plate along the bottom of the door, either attached to thedoorway floor or to the bottom door frame, to prevent water leakage fromthe bottom. It must be remembered that the lone installer is not only aneconomic necessity in the trade, but also, there is only so much roomavailable in the average bathroof for installation personnel. Becausetypically employed shower doors are quite thin (about /2 inch) yet largeand heavy, it is practically impossible for a lone installer, utilizinga plurality of two plate hinges, to install the door in the requiredhorizontal and vertical relationship to a previously installed uprightjamb. Consequently, it is accepted procedure for the jamb and door to bepivotably connected with two-plate hinges beforehand in the shower doorfactory, and then for the lone installer to uprightly attach thepost-like jamb component along one side of the doorway opening. However,this factory assembled structure is likewise large and heavy, and istherefore, quite cumbersome for one man to handle. It is almost asawkward for the lone installer to attach the post-like jamb so that itis in the required horizontal and vertical position as it would be topivotably connect the door to a previously positioned upright jambutilizing conventional two-plate hinges. Further, when suchfactory-assembled structures are employed, a double inventory must becarried so that the door can be mounted in either right-hand orleft-hand fashion, depending upon the layout of the bathroom site.

It is accordingly an object of the present invention to provide apivotal door construction that may be installed within a doorway openingwithout the use of two-plate hinges.

It is another object of the present invention to provide a pivotal doorconstruction that is especially adaptable to the bathroom fixtureindustry wherein it is economically and practically desirable that thedoor jamb be first vertically or uprightly positioned, and that the doorbe subsequently pivotably connected to the previously positioned jamb.

It is another object of the present invention to provide a pivotal doorconstruction that may be easily and quickly installed by but oneoperator on location.

It is yet another object of the present invention to provide a pivotaldoor construction wherein there is minimal space between the jamb anddoor so as to result in a leak-proof and aesthetically appealingstructure.

It is still another object of the present invention to provide anupright post-like door jamb from which a door may be pivotally hung ineither a left-hand or righthand fashion, said jamb automatically andinherently maintaining said pivotal door a prescribed distance above thebase of the doorway.

It is a further object of the present invention to provide a shower doorthat may be readily measured and positioned along one side of the showerenclosure doorway without the necessity of simultaneously handling boththe door and jamb.

These and other objects and advantages are accomplished by means of anovel elongate door jamb, said jamb including an integrally attachablelower tab and an integrally attachable upper terminal plate, said taband plate having outward extensions toward a door, the door beingrevolvably supported by the tab and plate outward extensions.

In the drawing, which illustrates the preferred embodiment of thepresent invention, and in which like numbers refer to like parts in theseveral views:

FIGURE 1 is an exploded view of the pivotal door construction of thepresent invention, this exploded view being particularly appropriate toillustrate the preferred method of assembling the several parts of thepivotal door construction.

FIGURE 2 is a side elevational detail view of the pivotal doorconstruction of. the present invention, with portions of the shower doorframe and the jamb broken away to show constructional details.

FIGURE 3 is a sectional View of the pivotal door construction takenalong line 3-3 of FIGURE 2.

FIGURE 4 is a perspective view of the terminal plate component of thepivotal door construction.

FIGURE 5 is a top plan view of the lower tab component of the pivotaldoor construction.

As can best be seen in FIGURES 1 and 2, the pivotal door construction 10of the present invention comprises an upright elongate jamb 11. Jamb 11is integrally provided with a lower tab 12 and an upper terminal plate13, said tab 12 and plate 13 extending outwardly of said jamb 11 towardan upright door 14. Door 14 is preferably pivotably connected to theoutward extensions of lower tab 12 and terminal plate 13.

Upright elongate jamb 11 comprises an elongate bar having two opposedside panels 17 and 18 and an intervening front panel 19, said threepanels being joined together in a substantially U-shaped relationship.The interior cross-sectional shape of jamb 11 includes two constrictedportions, the first constriction 20 being nearer to the jamb front panel19. First constriction 20 is preferably of arcuate shape and must have aperipheral or circumferential length of at least 210 degrees so as to beadapted to securely engage a cylindrical fastener e.g. 21 and 22,internally along jamb 11. The second constriction 23 is located nearerto the open end of said U than is first constriction 20. The exteriorcontour of elongate jamb 11 preferably includes a curvilinearly concaveface 24 for the intervening front panel 19 and a longitudinal recess 25at the juncture of front panel 19 and a side panel 17. The elongate jamb11 has at least two perforations through the front panel 19 thereof foraccommodation of fastener screws 26 and 27, these two screws beingutilized to vertically attach jamb 11 along one side 28 of an opendoorway.

As can best be seen in FIGURE 1, the elongate jamb 11 initiallypossesses three segments including two short terminal segments 31 and 32separated from an intervening major medial segment 33 by two deepnotches 34 and 35 in the front panel 19. The length of the major medialsegment 33 is substantially equivalent to the height of vertical frame41 of shower door 14. The lengths of the shorter terminal segments areapproximately equal and are substantially equivalent to that height towhich the bottom of door 14 is to be maintained above the doorway floor;normally this height is about A; inch. There is commonly a water-proofgutter plate along the bottom of shower door 14, said gutter plate beingattached to the doorway floor, or preferably as a plate 55 attached tothe door itself, as shown in dotted line in FIGURE 1. Before the jamb 11is vertically attached along doorway 28, one of the terminal segmentse.g. 31, is physically removed from jamb 11. Then, jamb 11 is attachedalong doorway 28 with the remaining terminal segment 32 being at thebottom of the doorway to ultimately act as a spacer between the bottomsof the doorway and the shower door 14. Top edge 36 of medial segment 33provides the upper terminus of jamb 11. In the drawing, door 14 pivotsrightwardly of'jamb 11. If a leftward pivot were desired, then segment32 (rather than 31) would be physically removed, jamb 11 would beinverted so that remaining segment 31 is downward, and jamb 11 would beattached to the opposite vertical side of the open doorway. Thus, thethree-segment jamb 11 has dual-purpose applicability for both lefthanded and right handed pivoted door constructions.

Also before jamb 11 is vertically attached, the pointed end 29 of lowertab 12 is inserted into notch 35 between medial segment 33 and theremaining terminal segment 32. Lower tab 12 is integrally connected tofirst constriction 20 of jamb 11 by means of a self tapping cylindricalfastener 22 passing through perforation 37 of lower tab 12. Pointed end29 fits snugly within second constriction 23, so as to prevent rotationof lower tab 12 within jamb 11. A portion of lower tab 12 includingperforation 38 extends outwardly of jamb 11 toward upright door 14.

While any type of upright door may be employed, a frame type shower doorwill be described because the pivotal door construction of the presentinvention has special installation advantages in the tub and showertrade. Whatever upright door is employed, it is extremely desirable toprovide a pivotal relationship between the door 14 and with the outwardextensions of lower tab 12 and upper terminal plate 13. This pivotalrelationship may be conveniently provided in one of two ways. Forexample, as is shown in the drawing, the door 14 may be provided withtwo integral vertical door pins, one pin 15 at the top and the other 16at the bottom of the vertical door frame 41 immediately adjacent to jamb11; these two pins are revolvably surrounded by perforations 38 and 53,in the outward extensions of lower tab 12 and terminal plate 13,respectively. Another equivalent manner is to provide two perforationsinto the adjacent door frame 41, one at the top and the other at thebottom, and to provide the door pins integral with imperforate outwardextensions of lower tab 12 and terminal plate 13, the door pins beingrevolvably surrounded by perforations in vertical frame 41.

That manner of pivotal relationship between shower door 14 and theoutward extensions of tab 12 and plate 13, as shown in the drawing, doesemploy door pins 15 and 16 integral with vertical frame 41. The typicalshower door structure 14 shown in the drawing comprises a translucentrectangular pane 40 securely bounded by four channelled rail frames 41,42, 43, and 44, including vertical frames 41 and 43 and horizontalframes 42 and 44. The respective frames intersect one another in abevelled-corner relationship. Because the channelled rail frames in ashower door are commonly extruded from aluminum or other metal, it hasbeen found advantageous to include within the extruded shape ofadja/cent vertical frame 41 an internal constriction 45 adapted toaccommodate the door pins 15 and 16. The type of door pins 15 and 16shown in the drawing are integrally attacher to the head of a threadedbolt 46. Thus, the door pins 15 and 16 are simply integrally attached toadjacent vertical frame 41 by means of secure engagement of the threadedbolt shank with frame constriction 45.

If the exterior contour of jamb 11 includes a curvilinearly concave face24, it is desireable to include a curvilinearly convex face 47 withinvertical frame 41, so that frame 41 and jamb 11 are similarly mated asthe door 14 is pivoted about jamb 11. This convex-concave relationshipdoes permit an extremely close spatial relationship between jamb 11 andadjacent door frame 41. The exterior contour of vertical frame 41 alsopreferably includes a flange-like projection 48 that fits intolongitudinal recess 25 when door 14 is in the closed position.Flange-like projection 48 being on the interior of the shower enclosure,it does inhibit water leakage from the shower spray through the junctureof jamb 11 and door 14. For the following two reasons, it is desirablethat flange-like propection 48 fit wholly within recess 25 and flushwith side panel 17. Firstly, to provide an aesthetically pleasingappearance from the interior of the shower stall. Secondly, in that agutter plate 55, shown in dotted line in FIGURE 1, may be very simplymounted along bottom horizontal door frame 44, said gutter plate 55extending beyond vertical frame 41 and vertical jamb 11. If theflange-like projection 48 is flush with side panel 17, the gutter plateneed not be notched to accomodate projection 48.

As can best be seen in the FIGURE 4 perspective view, upper terminalplate 13 includes a tongue portion 51 as an integral part thereof. Thereare two perforations in terminal plate 13, including first perforation52 near to tongue 51 and second perforation 53 more remote from tongue51. Terminal plate 13 is attached to the upper end of attached jamb 11at the upper terminus 36 of medial segment 33. Tongue 51 of terminalplate 13 fits downwardly between first constriction 20' and secondconstriction 23 of jamb 11; elongated fastener screw 21, passing throughplate perforation 52 and threadedly engaged by first constriction 20,together with tongue 51 rot-ation ally fix plate 13 with respect to jamb11. That portion of terminal plate 11 which extends outwardly towarddoor 14 includes perforation 53. Perforation 53 revolvably surrounds topdoor pin 15, thus holding shower door 14 adjacent to terminus 36 of jamb11.

The method for installing the pivotal door construction is as follows:First, depending upon whether a right hand or left hand door connectionis desired, the appropriate terminal segment, 31 or 32, is removed fromthe originally provided tri-segment jamb. Then, the pointed end 29 oftab 12 is inserted into the remaining notch, 34 or 35, at the junctureof the jamb major medial segment 33 and the remaining terminal segment.Screw 22 is threaded along the first constriction 20 of the remainingterminal segment until said screw passes through perforation 29 of lowertab 12, thus holding lower tab 12 securely within jamb 11. Next, jamb 11is attached in upright vertical fashion along vertical doorway 28 bymeans of screws 26 and 27 passing through perforations of jamb frontpanel 19; lower tab 12 is at the bottom of the doorway while the exposedend 36 of medial segment 33 is at the top of the doorway.

Then, the bottom door pin 16, integral with shower door vertical frame41, is inserted through perforation 38 located in the outward extensionof lower tab 12. Next, top door pin 15, also integral with door frame41, is inserted through perforation 53 in top terminal plate 13. Thenthe tongue 51 of top terminal plate 13 is inserted downwardly betweenjamb constrictions 20 and 23. Screw 21 is inserted into perforation 52of plate 13 and threaded along constriction 20, thus holding terminalplate 13 tightly against the top end of jamb 11 which coincides with theexposed terminus 36 of major medial segment 33.

While it is preferred to attach the shower door by means of door pins tothe terminal plate 13 and the lower tab 12 that extend outwardly of jamb11, it is also permissible to attach the plate 13 and tab 12 to the door14 and to pivotably attach these to the jamb. To do so would requirepivot pins in the jam-b, preferably being driven along jam-bconstriction 20 so as to intersect perforations in the terminal plate 13and lower tab 12.

From the foregoing, the construction and operation of the pivotal doorconstruction will be readily understood and further explanation isbelieved to be unnecessary. However, since numerous modifications andchanges will readily occur to those skilled in the art, it is notdesired to limit the invention to the exact construction shown, anddescribed, and accordingly, all suitable modifications and equivalentsmay be resorted to, falling within the scope of the appended claims.

I claim:

1. A pivotal door construction comprising:

(A) An upright bar-like elongated jamb comprising two opposed sidepanels and an intervening front panel, said three panels beingintegrally joined together in a U-shaped relationship, said three panelsbeing of appropriate cross-sectional shape whereby the internalcross-section of said U-shaped elongate jamb adjacent to the front panelincludes a constricted portion adapted to securely engage an elongatefastener internally along said elongate jamb, said upright elongate jambfront panel being deeply notched near the bottom of said jamb, said jambincluding an integrally connected tab within the front panel notchedportion of said jamb, said tab intersecting the jamb front panel, aportion of said tab extending outwardly of said jamb toward said door,

(B) a terminal plate connected to the top end of said elongate jamb bymeans of a fastener surrounded by the jamb constricted portion, aportion of said terminal plate extending outwardly of said jamb towardsaid door, and

(C) an upright door pivotably connected to the integral tab and terminalplate of said upright elongate jamb by means of a pair of vertical pinsextending vertically from said vertical door adjacent to the uprightjamb, one of said pins being disposed at the bottom of said door andanother of said pins being disposed at the top of said door.

2. A pivotal shower door construction comprising:

(A) An upright bar-like elongate jamb comprising two opposed side panelsand an intervening front panel, said three panels being integrallyjoined together in a U-shaped relationship, said front panel being ofappropriate cross-sectional shape whereby the internal cross-section ofsaid U-shaped elongate jamb includes a constricted portion adopted tosecurely engage an elongate fastener internally along said elongatejamb, said upright elongate jamb front panel being deeply notched nearthe bottom end of said jamb, said jamb including an integrally connectedtab within the front panel notched portion of said jamb, said lower tabintersecting the jamb front panel, a perforate portion of said tabextending outwardly of said jamb toward said door,

(B) A terminal plate connected to the upper end of said elongate jamb bymeans of a fastener securely engaged by the jamb constricted portion, aperforate portion of said terminal plate extending outwardly of saidjamb toward said door, and

(C) An upright door pivotably connected to the integral tab and terminalplate of said upright elongate jamb, said vertical door having a pair ofvertical integral pins extending vertically from said vertical dooradjacent to the upright jamb, one of said integral pins being disposedat the bottom of said door and another of said integral pins beingdisposed at the top of said door, the top door pin being revolvablysecured by the perforate portion of the upper terminal plate, the bottomdoor pin being revolvably secured by the outwardly extending perforateportion of the lower integral tab.

3. A pivotal shower door construction comprising: (A) An uprightbar-like elongate jamb comprising two opposed side panels and anintervening front panel, said three panels being integrally joinedtogether in a U-shaped relationship, said threepanels being ofappropriate cross-sectional shape whereby the internal cross-section ofsaid U-shaped elongate jamb includes two constricted portions, the firstof said constricted portions being within the front panel and the secondof said constricted portions being located nearer to the open end ofsaid U, said upright elongate jamb including a tab nearer to the lowerend thereof, said tab intersecting the jamb front panel and integrallyconnected to the jamb by means of an elongate fastener passing throughsaid lower tab and being securely engaged by said first constrictedportion, a perforate portion of said lower tab extending outwardly ofsaid jamb toward said door,

(B) A terminal plate connected to the upper end of said elongate jamb bymeans of a fastener securely engaged by the jamb first constrictedportion, said terminal plate including an integral tongue portiondisposed downwardly between the first and second constricted portions ofsaid jamb, a perforate portion of said terminal plate extendingoutwardly of said jamb toward said door, and

(C) An upright door pivotably connected to the integral tab and terminalplate of said upright elongate jamb, a vertical frame adjacent to thejamb of said upright door being provided with a pair of integral doorpins, one of said door pins being disposed at the bottom of said doorand another of said integral door pins being disposed at the top of saiddoor, the top door pin being revolvably secured by the outwardlyextending perforate portion of the terminal plate, the bottom door pinbeing revolvably secured by the outwardly extending perforate portion ofthe lower integral tab.

4. A hinged shower door construction comprising: (A) An upright bar-likeelongate jamb comprising two opposed parallel side panels and anintervening front panel, said three panels being integrally joinedtogether in a U-shaped relationship,

(i) the exterior contour of said unitary jamb being curvilinearlyconcave along said intervening front panel, said front panel beingprovided with at least two perforations along the length thereof, theexterior contour being longitudinally recessed along the juncture of aside panel and said curvilinearly concave intervening front panel,

(ii) said three panels being of appropriate crosssectional shape wherebythe internal cross-section of said U-shaped elongate jamb includes twoconstricted portions, the first of said constricted portions beingwithin the front panel and the second said constricted portions beinglocated nearer to the open end of said U,

said upright elongate jamb including a tab nearer to the lower endthereof said tab intersecting the jamb front panel and being integrallyconnected to the jamb by means of fatsener intersecting said lower taband being securely engaged by said first constricted portion, aperforate portion of said lower tab extending outwardly of said jambtoward said door,

(B) A terminal plate connected to the upper end of said elongate jamb bymeans of a fastener threadedly engaged with the jamb first constrictedportion, said terminal plate including an integral tapered tongue wedgeddownwardly between the first and second constricted portions of saidjamb, a perforate portion of said terminal plate extending outwardly ofsaid jamb toward said door, and

(C) An upright door pivotably connected to the integral tab and terminalplate of said upright elongate jamb, said vertical door comprising athin rectangular panel securely bounded by four channelled rail frames,the cross-section of the vertical door frame adjacent to the jambcomprising two opposed parallel side panels and an intervening frontpanel, said three panels being integrally joined together in a U-shapedrelationship,

(i) the exterior contour of said adjacent vertical door frame beingcurvilinearly convex along said intervening front panel, the exteriorcontour including a finger-like projection along the juncture of a sidepanel andsaidcurvilinearly convex intervening front panel whereby whenthe door is closed, the finger-like projection extends into thelongitudinal recess of said upright jamb,

(ii) The interior contour of said adjacent vertical door frame,including a constricted portion within the front panel so adapted tosecurely engage a rod-like fastener internally along said adjacentvertical door frame, and

(iii) a'pair of door pins integrally with said adjacent vertical doorframe, said door pins being securely engaged by the constricted portionthereof, one of said door pins being disposed at the bottom of said doorand another of said integral door pins being disposed at the top of saiddoor, the top door pin being revolvably secured by the outwardlyextending perforate portion of the terminal plate, and the bottom doorpin being revolvably secured by the outwardly extending perforateportion of the lower integral tab.

5. The method of installing a pivotal shower door into the doorway of ashower stall, said method comprising:

(A) Removing a terminal segment of a bar-like elongate jamb said jambcomprising two opposed side panels and an intervening front panel, saidthree panels being integrally joined together in a U-shapedrelationship, said bar-like jamb being of appropriate cross-sectionalshape whereby the internal crosssection thereof includes aconstrictedportion adjacent to the front panel that is adapted to securely engagean elongate fastener internally along said elongate jamb, said elongatejamb front panel being deeply notched near each of the two jamb terminiso as to define two short terminal segments and a major medial segmentfor said elongate jamb,

(B) Vertically attaching said segmentized elongate jamb along one sideof said doorway, so that the remaining terminal segment is locatedbeneath the major medial segment and in abutment with the bottom of thedoorway,

(C) Attaching a tab to said jamb front panel at the juncture of saidmedial segment and remaining terminal segment, a portion of said tabextending outwardly of said jamb toward said door,

(D) Fitting an upright door into said tab, said upright door having anintegral pair of vertical door pins, one of said door pins beingdisposed at the bottom of said door, and another of said door pins beingdisposed at the top of said door, the bottom integral door pin beinginserted into the outwardly extending perforate portion of said lowertab so that said lower tab revolvably secures said bottom door pin, and

(E) Connecting a terminal plate across the remaining top end of thesegmentized elongate jamb, said terminal plate being held against saidremaining top end by means of a fastener surrounded by the jambconstricted portion, said terminal plate including a perforate portionextending outwardly of said jamb toward said door and revolvablysurrounding said top door pin.

6. The hinged shower door construction of claim 4 wherein the fourchannelled rail frames of the upright door include a bottom horizontaldoor frame and wherein a gutter plate member is mounted along saidbottom horizontal door frame, said gutter plate member extending beyondthat vertical door frame adjacent to the jamb and toward said jamb.

References Cited by the Examiner UNITED STATES PATENTS 1,952,836 3/1934Burt 189-46 2,152,746 4/1939 Levan 189465 2,736,403 2/1956 Gwynne 18976HARRISON R. MOSELEY, Primary Examiner. KENNETH DQWNEY, Examiner,

1. A PIVOTAL DOOR CONSTRUCTION COMPRISING: (A) AN UPRIGHT BAR-LIKEELONGATED JAMB COMPRISING TWO OPPOSED SIDE PANELS AND AN INTERVENINGFRONT PANEL, SAID THREE PANELS BEING INTEGRALLY JOINED TOGETHER IN AU-SHAPED RELATIONSHIP, SAID THREE PANELS BEING OF APPROPRIATECROSS-SECTIONAL SHAPE WHEREBY THE INTERNAL CROSS-SECTION OF SAIDU-SHAPED ELONGATE JAMB ADJACENT TO THE FRONT PANEL INCLUDES ACONSTRICTED PORTION ADAPTED TO SECURELY ENGAGE AN ELONGATE FASTENERINTERNALLY ALONG SAID ELONGATE JAMB, SAID UPRIGHT ELONGATE JAMB FRONTPANEL BEING DEEPLY NOTCHED NEAR THE BOTTOM OF SAID JAMB, SAID JAMBINCLUDING AN INTERNALLY CONNECTED TAB WITHIN THE FRONT PANEL NOTCHEDPORTION OF SAID JAMB, SAID TAB INTERSECTING THE JAMB FRONT PANEL, APORTION OF SAID TAB EXTENDING OUTWARDLY OF SAID JAMB TOWARD SAID DOOR,(B) A TERMINAL PLATE CONNECTED TO THE TOP END OF SAID ELONGATE JAMB BYMEANS OF A FASTENER SURROUNDED BY THE JAMB CONSTRICTED PORTION, APORTION OF SAID TERMINAL PLATE EXTENDING OUTWARDLY OF SAID JAMB TOWARDSAID DOOR, AND (C) AN UPRIGHT DOOR PIVOTABLY CONNECTED TO THE INTEGRALTAB AND TERMINAL PLATE OF SAID UPRIGHT ELONGATE JAMB BY MEANS OF A PAIROF VERTICAL PINS EXTENDING VERTICALLY FROM SAID VERTICAL DOOR ADJACENTTO THE UPRIGHT JAMB, ONE OF SAID PINS BEING DISPOSED AT THE BOTTOM OFSAID DOOR AND ANOTHER OF SAID PINS BEING DISPOSED AT THE TOP OF SAIDDOOR.